Troy-Bilt TB110 Won’t Start(9 Common Problems + Solutions)

If you own a Troy-Bilt TB110 lawn mower and are experiencing difficulties starting it, you’re not alone.

Many users encounter issues starting their TB110 mower for various reasons.

This article will guide you through the troubleshooting process to help you identify and resolve the problem preventing your Troy-Bilt TB110 from starting.

Let dive in.

Troy-Bilt TB110 Won't Start

Troy-Bilt TB110 Won’t Start

Common Causes of Starting Issues

  • Fuel issues
  • Spark plug problems
  • Air filter blockage
  • Carburetor malfunction
  • Faulty safety features
  • Low or old engine oil
  • Ignition system failure
  • Starter rope issues
  • Mechanical complications
  • Electrical component failures

Troy Bilt tb110 Troubleshooting

1. Checking the Fuel System

One of the first areas to inspect when your Troy-Bilt TB110 won’t start is the fuel system. Follow these steps to ensure proper fuel flow:

  • Confirm that there is an adequate amount of fresh gasoline in the fuel tank.
  • Check for clogs or blockages in the fuel line.
  • Inspect the fuel filter for debris and replace it if necessary.

Read Can I Use Trufuel in My Lawn Mower(5 Benefits)

2. Inspecting the Spark Plug

A faulty spark plug can prevent your TB110 mower from starting. Perform the following steps to examine and clean or replace the spark plug:

  • Locate the spark plug, usually positioned on the side of the engine.
  • Remove the spark plug using a spark plug socket and inspect it for signs of wear or damage.
  • Clean the spark plug using a wire brush if it appears dirty or covered in residue.
  • If the spark plug is severely damaged or worn, replace it with a new one.

3. Examining the Air Filter

A clogged air filter restricts airflow and can cause starting issues. Follow these instructions to inspect, clean, or replace the air filter:

  • Locate the air filter housing, typically situated on the side or top of the engine.
  • Remove the cover or housing to access the air filter.
  • Inspect the air filter for dirt, debris, or excessive wear.
  • Clean the air filter using compressed air or replace it with a new one if it is damaged or excessively dirty.

4. Assessing the Carburetor

A malfunctioning carburetor can disrupt the fuel-air mixture, resulting in starting difficulties.

Consider these steps to evaluate and address any issues with the carburetor:

  • Locate the carburetor, usually positioned on the side of the engine.
  • Check for visible signs of damage or wear, such as leaks or loose connections.
  • Clean the carburetor using a carburetor cleaner spray, following the product instructions.
  • If cleaning doesn’t resolve the issue, consider seeking professional assistance for carburetor repair or replacement.

Read How to Put a Troy-Bilt Lawn Mower in Neutral(In 3 Steps)

5. Verifying the Safety Features

Troy-Bilt TB110 mowers are equipped with safety features that can prevent the engine from starting under certain conditions.

Ensure that these safety mechanisms are properly engaged or adjusted:

  • Check the presence and positioning of the operator presence control (OPC) bar.
  • Inspect the condition and alignment of the blade control handle.

6. Reviewing the Engine Oil

Inadequate or old engine oil can hinder the starting process. Take the following steps to evaluate and address any concerns related to the engine oil:

  • Locate the oil filler cap or dipstick.
  • Check the oil level to ensure it falls within the recommended range.
  • If the oil is old or dirty, drain it and replace it with fresh, high-quality oil.

7. Testing the Ignition System

A malfunctioning ignition system can prevent your Troy-Bilt TB110 from starting. Perform the following steps to test the ignition system:

  • Remove the spark plug and reconnect it to the spark plug wire.
  • Hold the spark plug against the engine block while pulling the starter rope.
  • Look for a visible spark between the spark plug electrode and the engine block.
  • If there’s no spark, the ignition system may require professional attention.

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8. Inspecting the Starter Rope

The starter rope allows you to initiate the starting process. If the rope is damaged or tangled, it can impede the starting mechanism.

Follow these steps to assess and address any starter rope issues:

  • Check the condition of the starter rope for fraying, breaks, or tangles.
  • Replace the starter rope if necessary, following the manufacturer’s instructions.

9. Addressing Mechanical Problems

Mechanical issues within the Troy-Bilt TB110 mower can prevent it from starting. If you suspect mechanical complications,

It’s advisable to consult a professional or authorized service center to diagnose and repair the problem.

Troubleshooting Electrical Components

Electrical components, such as the ignition switch or solenoid, can cause starting difficulties. If you suspect an electrical issue, it’s recommended to seek professional assistance to diagnose and repair any faults with these components.

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Troy Bilt tb110 won’t start

IssuePossible CausesTroubleshooting Steps
FuelLow or old fuel– Ensure there’s fresh fuel in the tank.<br>- If fuel is old, replace it.
OilLow oil level– Check oil level and top up if necessary.
Spark PlugDirty or worn spark plug– Inspect spark plug and replace if needed.<br>- Ensure proper connection.
Air FilterDirty or clogged air filter– Check air filter, clean or replace as required.
Primer BulbImproper priming– Prime the engine before starting.
ChokeIncorrect choke usage– Engage choke for cold start; disengage when warm.
Safety FeaturesEngaged safety mechanisms– Check blade control, handlebar position, and other safety features.
CarburetorClogged or dirty carburetor– Clean or rebuild carburetor if needed.
Ignition SystemLack of spark– Check for spark at the spark plug.
Fuel DeliveryClogged fuel line or carburetor– Inspect fuel line and carburetor for issues.
CompressionLow engine compression– Consider professional diagnosis and repair.

Seeking Professional Assistance

If you have exhausted all troubleshooting steps and your Troy-Bilt TB110 mower still won’t start, it’s advisable to contact a professional technician or authorized service center. They have the expertise to diagnose and resolve complex issues effectively.

Maintenance Tips to Prevent Start-Up Issues

To prevent starting problems with your Troy-Bilt TB110 mower in the future, consider the following maintenance tips:

  • Regularly clean and inspect the air filter.
  • Change the engine oil at the recommended intervals.
  • Keep the fuel tank filled with fresh gasoline.
  • Maintain the spark plug by cleaning or replacing it as needed.
  • Store the mower in a dry and protected area.

Read Best Oil for Troy-Bilt Lawn Mowers(Top 3 Oils)


Why does my Troy-Bilt TB110 lawn mower only start when the choke is engaged?

This issue typically indicates a carburetor problem. Clean or repair the carburetor to restore proper starting functionality.

Can a faulty safety feature cause the mower not to start?

 Yes, if the operator presence control (OPC) bar or blade control handle is not engaged correctly, the mower won’t start. Verify their positioning before attempting to start the mower.

How often should I replace the spark plug in my Troy-Bilt TB110 mower?

It’s recommended to replace the spark plug annually or after every 100 hours of operation.

Why is there no spark when I check the ignition system?

A lack of spark could indicate a faulty ignition coil or other electrical issues. Seek professional assistance to diagnose and repair the ignition system.

Can mechanical problems prevent the mower from starting?

 Yes, mechanical issues such as a seized engine or damaged starter assembly can prevent the mower from starting. Consult a professional for proper diagnosis and repair.

Final Remarks

Troubleshooting starting issues with your Troy-Bilt TB110 mower can be a systematic process.

By following the steps outlined in this guide, you can identify and resolve the problem preventing your mower from starting.

Remember to conduct regular maintenance to prevent future starting difficulties and ensure the optimal performance of your Troy-Bilt TB110 mower.

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George Bill
George Bill

George Bill is a Mechanical Engineer by Profession and an avid gardener and has been mowing his lawn for over 20 years. He has used a variety of different mowers during this time.
George is an expert at maintaining his mowers and over the years, he has learned many tricks and techniques for getting the best results from his mowers and is always happy to share his knowledge on this site.